Getting an invalid model function error when the function is declared.

[eluser]doors[/eluser]
I have a crud model for my menu system.

When I load the model and try to execute three particular functions that are declared in the model I get php error stating that the model function is not declared.

The error is as follows:

Fatal error: Call to undefined method Main_model::edit_menu() ...


Can anyone tell me what is going on?